Kenneth Shinozuka, from New York City, wants to help people with Alzheimer’s Disease, like his grandfather. Kenneth developed a small, wearable sensor to be worn on his grandfather’s foot. When pressure is applied to the sensor, it alerts his family via a mobile app, which allows them to monitor when his grandfather is on the move. By monitoring this behavior, Kenneth hopes to understand the causes of wandering brought on by Alzheimer’s, and to ultimately find a way to mitigate or prevent it.

Samuel Burrow, from the U.K., wants to improve the environment by reducing pollution. Taking inspiration from the chemical used in sunscreen, Samuel created a special coating that reduces waste chemicals in the air when subjected to ambient light. And Cynthia Sin Nga Lam, from Australia, thinks everyone deserves access to clean water and created an eco-friendly and economical device to do just that.

These are just a few examples of the 15 incredible projects we’ve named as the global finalists for 2014 Google Science Fair. This is our fourth time hosting the competition as a way to encourage the next generation of scientists and engineers. From Russia to Australia, India to Canada, this year’s finalists (ages 13-18) are already well on their way to greatness. See all 15 projects on the Google Science Fair website.

Special recognition also goes to Kenneth, who has also been awarded the Scientific American Science In Action Award. The prize celebrates a project that addresses a health, resource or environmental challenge, and comes with a year’s mentoring from Scientific American and a $50,000 grant toward the project.

What’s next for our young scientists? Well, next month, they’ll be California-bound to compete at Google HQ for the three Age Category Awards (ages 13-14, 15-16, 17-18) and of course, the overall Google Science Fair Grand Prize Award. The competition will end in style with an awards ceremony, which will be live streamed on the Science Fair YouTube channel and on our website. Tune in to be one of the first to find out this year’s winners!

But first, you get to have your say! We need you to pick your favorite project for the 2014 Voter’s Choice Award. Show your support for the finalists and cast a vote on the Google Science Fair website beginning September 1. Every year, we're blown away by the projects and ideas these young people come up with, and you will be too.